package cn.tj212.inmall.utils;


import ch.qos.logback.classic.gaffer.PropertyUtil;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {

    private static String byteArrayToHexString(byte[] b) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++) {
            resultSb.append(byteToHexString(b[i]));
        }
        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0) {
            n += 256;
        }
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    /**
     * 返回大写的MD5
     * @param origin
     * @param charsetName
     * @return
     */
    private static String MD5Encode(String origin, String charsetName) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest messageDigest = MessageDigest.getInstance("MD5");
            if (charsetName == null || "".equals(charsetName)) {
                resultString = byteArrayToHexString(messageDigest.digest(resultString.getBytes()));
            } else {
                resultString = byteArrayToHexString(messageDigest.digest(resultString.getBytes(charsetName)));
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return resultString.toUpperCase();
    }

//    public static String MD5encodeutf8(String origin){
//        origin=origin+ PropertiesUtil.getProperty("inmall.salt","xiaoyin");
//        return MD5Encode(origin,"utf-8");
//    }

    public static String MD5EncodeUtf8(String origin) {
        return MD5Encode(origin, "utf-8");
    }

    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
}
